Date and Time of Avalanchesort descending Avalanche Type Trigger Size Starting Elevation Aspect Number of similar avalanches
Going to the Sun Road Wet Loose Natural D2 Above 6,500 ft South 10-20
Siyeh Bend/East face Piegan Mtn.
Forecaster Observation - Cascade drainage, Flathead Range
Great Northern
Snowslip Mountain/Burnout avalanche path Soft Slab Natural D2.5 , R3
Going to the Sun Road Glide Natural D2.5 , R3 Above 6,500 ft Northeast 3
Going to the Sun Road Wet Slab Natural
Cornice Fall Triggered
D2 , R2 Above 6,500 ft Northeast 3
11/22/2017 - 17:45
Forecaster Observation - Skiumah Lake, Flathead Range
Unknown Natural D2.5 , R3 Above 6,500 ft North 5-10
11/22/2017 - 21:30
Forecaster Observation - Rescue Creek, Flathead Range
Unknown Natural D2 Above 6,500 ft 5-10
12/02/2017 - 17:15
Forecaster Observation - Skiumah Lake, Flathead Range
Hard Slab Natural D2 , R2 Above 6,500 ft North 1
12/09/2017 - 13:00
Forecaster Observation - Mt. Stanton, Glacier National Park
Wet Loose Natural D1.5 , R1 Above 6,500 ft South 10-20
12/09/2017 - 13:30
Forecaster Observation - Mt. Thompson-Seton, Whitefish Range
Loose Dry/ Sluff Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast 1
12/10/2017 - 14:15
Forecaster Observation - Mt. Stanton, Glacier National Park
Loose Dry/ Sluff Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast
12/14/2017 - 13:15
Forecaster Observation - Little Matterhorn, Glacier National Park
Loose Dry/ Sluff Skier
Intentionally Triggered
D2 , R1 7000 Northeast
12/16/2017 - 13:00
Forecaster Observation - Rescue Creek, Flathead Range
Loose Dry/ Sluff Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast 3
12/18/2017 - 12:15
Canyon Creek, southern Whitefish Range
Soft Slab Natural D1
12/19/2017 - 08:15
Forecaster Observation - Ghoulie Ridge, Whitefish Range
Soft Slab Natural D1.5 , R1 Between 5,000 and 6,500 ft Northeast 2
12/19/2017 - 13:00
Forecaster Observation - Ghoulie Ridge, Whitefish Range
Soft Slab Natural D2 , R2 Between 5,000 and 6,500 ft South 3
12/19/2017 - 13:30
Forecaster Observation - Ghoulie Ridge, Whitefish Range
Soft Slab Natural D1 , R1 Between 5,000 and 6,500 ft 10-20
12/19/2017 - 15:45
Forecaster Observation - Middle Fork Corridor
Soft Slab Natural D1.5 , R1 Below 5,000 ft 10-20

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